Authorities in Texas and other states are beginning to re-examine old cases where defendants were sent to prison for setting fires based on expert testimony about burn patterns and charring that today is considered suspect.  Nine years ago Texas executed Cameron Todd Willingham for killing his three children in a fire but many experts believe this was a wrongful conviction.

 http://www.mail.com/news/us/1969292-arson-convictions-challenged-fire-science.html